forked from mirror/libbpg
libbpg-0.9.6
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171
x265/source/encoder/analysis.h
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171
x265/source/encoder/analysis.h
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/*****************************************************************************
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* Copyright (C) 2013 x265 project
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*
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* Authors: Deepthi Nandakumar <deepthi@multicorewareinc.com>
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* Steve Borho <steve@borho.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111, USA.
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*
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* This program is also available under a commercial proprietary license.
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* For more information, contact us at license @ x265.com.
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*****************************************************************************/
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#ifndef X265_ANALYSIS_H
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#define X265_ANALYSIS_H
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#include "common.h"
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#include "predict.h"
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#include "quant.h"
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#include "yuv.h"
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#include "shortyuv.h"
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#include "cudata.h"
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#include "entropy.h"
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#include "search.h"
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namespace X265_NS {
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// private namespace
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class Entropy;
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class Analysis : public Search
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{
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public:
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enum {
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PRED_MERGE,
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PRED_SKIP,
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PRED_INTRA,
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PRED_2Nx2N,
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PRED_BIDIR,
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PRED_Nx2N,
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PRED_2NxN,
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PRED_SPLIT,
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PRED_2NxnU,
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PRED_2NxnD,
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PRED_nLx2N,
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PRED_nRx2N,
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PRED_INTRA_NxN, /* 4x4 intra PU blocks for 8x8 CU */
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PRED_LOSSLESS, /* lossless encode of best mode */
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MAX_PRED_TYPES
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};
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struct ModeDepth
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{
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Mode pred[MAX_PRED_TYPES];
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Mode* bestMode;
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Yuv fencYuv;
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CUDataMemPool cuMemPool;
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};
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class PMODE : public BondedTaskGroup
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{
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public:
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Analysis& master;
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const CUGeom& cuGeom;
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int modes[MAX_PRED_TYPES];
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PMODE(Analysis& m, const CUGeom& g) : master(m), cuGeom(g) {}
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void processTasks(int workerThreadId);
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protected:
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PMODE operator=(const PMODE&);
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};
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void processPmode(PMODE& pmode, Analysis& slave);
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ModeDepth m_modeDepth[NUM_CU_DEPTH];
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bool m_bTryLossless;
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bool m_bChromaSa8d;
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Analysis();
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bool create(ThreadLocalData* tld);
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void destroy();
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Mode& compressCTU(CUData& ctu, Frame& frame, const CUGeom& cuGeom, const Entropy& initialContext);
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protected:
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/* Analysis data for load/save modes, keeps getting incremented as CTU analysis proceeds and data is consumed or read */
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analysis_intra_data* m_reuseIntraDataCTU;
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analysis_inter_data* m_reuseInterDataCTU;
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int32_t* m_reuseRef;
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uint32_t* m_reuseBestMergeCand;
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uint32_t m_splitRefIdx[4];
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/* full analysis for an I-slice CU */
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void compressIntraCU(const CUData& parentCTU, const CUGeom& cuGeom, uint32_t &zOrder, int32_t qp);
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/* full analysis for a P or B slice CU */
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uint32_t compressInterCU_dist(const CUData& parentCTU, const CUGeom& cuGeom, int32_t qp);
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uint32_t compressInterCU_rd0_4(const CUData& parentCTU, const CUGeom& cuGeom, int32_t qp);
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uint32_t compressInterCU_rd5_6(const CUData& parentCTU, const CUGeom& cuGeom, uint32_t &zOrder, int32_t qp);
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/* measure merge and skip */
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void checkMerge2Nx2N_rd0_4(Mode& skip, Mode& merge, const CUGeom& cuGeom);
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void checkMerge2Nx2N_rd5_6(Mode& skip, Mode& merge, const CUGeom& cuGeom, bool isShareMergeCand);
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/* measure inter options */
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void checkInter_rd0_4(Mode& interMode, const CUGeom& cuGeom, PartSize partSize, uint32_t refmask[2]);
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void checkInter_rd5_6(Mode& interMode, const CUGeom& cuGeom, PartSize partSize, uint32_t refmask[2]);
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void checkBidir2Nx2N(Mode& inter2Nx2N, Mode& bidir2Nx2N, const CUGeom& cuGeom);
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/* encode current bestMode losslessly, pick best RD cost */
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void tryLossless(const CUGeom& cuGeom);
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/* add the RD cost of coding a split flag (0 or 1) to the given mode */
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void addSplitFlagCost(Mode& mode, uint32_t depth);
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/* work-avoidance heuristics for RD levels < 5 */
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uint32_t topSkipMinDepth(const CUData& parentCTU, const CUGeom& cuGeom);
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bool recursionDepthCheck(const CUData& parentCTU, const CUGeom& cuGeom, const Mode& bestMode);
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/* generate residual and recon pixels for an entire CTU recursively (RD0) */
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void encodeResidue(const CUData& parentCTU, const CUGeom& cuGeom);
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int calculateQpforCuSize(const CUData& ctu, const CUGeom& cuGeom);
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/* check whether current mode is the new best */
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inline void checkBestMode(Mode& mode, uint32_t depth)
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{
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X265_CHECK(mode.ok(), "mode costs are uninitialized\n");
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ModeDepth& md = m_modeDepth[depth];
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if (md.bestMode)
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{
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if (mode.rdCost < md.bestMode->rdCost)
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md.bestMode = &mode;
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}
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else
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md.bestMode = &mode;
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}
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};
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struct ThreadLocalData
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{
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Analysis analysis;
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void destroy() { analysis.destroy(); }
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};
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}
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#endif // ifndef X265_ANALYSIS_H
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